VUB-RECOIL Archives

Vub measurement using recoil of fully reconstructed Bs

VUB-RECOIL@LISTSERV.SLAC.STANFORD.EDU

Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Daniele del Re <[log in to unmask]>
Date:
24 Jun 2002 09:25:33 -0700 (PDT)Mon, 24 Jun 2002 09:25:33 -0700 (PDT)
Content-Type:
TEXT/PLAIN
Parts/Attachments:
TEXT/PLAIN (49 lines)

Hi all,

 the track momentum and the neutral energy spectrum are different between
data and MC. In

 http://www.slac.stanford.edu/~daniele/vub/comp1600.ps   TRACKS

 http://www.slac.stanford.edu/~daniele/vub/comp9900.ps   NEUTRALS

 this difference is shown.


 Taking this difference into account and reweighting the MC (basically
taking the numbers from the ratio plot in the bottom of the ps files) on
data I got:


 No reweighting:

 BRBR :0.0161+-0.0031


 Trk reweighting:

 BRBR :0.0162+-0.0030


 Neu reweighting:

 BRBR :0.0169+-0.0030


 Total reweighting:

 BRBR :0.0172+-0.0029


 The difference for the tracking is within the systematics quoted in the
BAD. The neutral one is larger (5% instead of 2%). We could use the more
conservative 5% for the neutral reconstruction systematics.


 Daniele





ATOM RSS1 RSS2